- Modern world
- Game-like world
- Novel world
- Levels
- Modern World
- Tower
- Letter Ranking
- Constellations
- Considers logic a lot more than usual
- Modern world
- Dungeons
- Letter-based ranking
- Modern world
- Gates/Rifts
- BL
- Modern (1990s) world
- Dungeons
- I don't know the ranking system
- Stock market
- A lot of illegal money laundering/tax evasion type stuff
- Cancelled and remade in a different art style (I haven't read the remake)
- Modern person in alternate world
- Stages
- Stats-based system
- Modern world
- Tutorial/game setting as well as dungeons etc. though they're not currently plot relevant
- Congratulations
- Level-based ranking though skills have letter-based rankings
- Regression plot
- Tutorial
- (Presumably monster invasion of earth)
- Modern world
- Levels
- Modern World
- Tower/dungeons in tower
- Levels and letter ranking
- The title is misleading (and not at all related to the actual plot)
- Modern world
- Alternate universe/unique monster appearance
- Levels
- Regression
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